# Z movement is doubled
**URL:** https://klipper.discourse.group/t/z-movement-is-doubled/16288
**Category:** General Discussion
**Created:** [May 6, 2024, 9:38am UTC](https://klipper.discourse.group/t/z-movement-is-doubled/16288 "2024-05-06T09:38:50Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@xenerax](https://klipper.discourse.group/u/xenerax)
#### Post date: [May 6, 2024, 9:38am UTC](https://klipper.discourse.group/t/z-movement-is-doubled/16288/1 "2024-05-06T09:38:50Z")
### Basic Information:
Printer Model: Ender 3
MCU / Printerboard: mks sgenl v2
Host / SBC
klippy.log [klippy (1).log](https://klipper.discourse.group/uploads/short-url/k4zc3kN4U1Kfqicu00Zh7mryvVU.log) (3.1 MB)
_Fill out above information and_ **_in all cases attach your_ `klippy.log` _file_** (use zip to compress it, if too big). _Pasting your_ `printer.cfg` _is **not** needed_
_ **Be sure to check our “Knowledge Base” Category first. Most relevant items, e.g. error messages, are covered there** _
### Describe your issue:
my z stepper is moving 2x the amount it should. this results in prints that look like the picture. clicking “move 25 up” in mainsail moves the nozzle 5cm up.
i tried changing the rotation distance but it just dug itself into the print.
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### Author:  [@LifeOfBrian](https://klipper.discourse.group/u/LifeOfBrian)
#### Post date: [May 6, 2024, 9:48am UTC](https://klipper.discourse.group/t/z-movement-is-doubled/16288/2 "2024-05-06T09:48:57Z")
Then you should halve the **rotation\_distance** in the **stepper\_z** section:
`rotation_distance = 4`
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### Author:  [@xenerax](https://klipper.discourse.group/u/xenerax)
#### Post date: [May 6, 2024, 10:43am UTC](https://klipper.discourse.group/t/z-movement-is-doubled/16288/3 "2024-05-06T10:43:25Z")
thanks i think i found the problem.
i tried 4 before but the extruder setting was wrong, i misunderstood the klipper guide and put a smaller number instead of a bigger number to decrease the feeding speed.
im printing right now an so far it looks promising.
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### Author:  [@LifeOfBrian](https://klipper.discourse.group/u/LifeOfBrian)
#### Post date: [May 6, 2024, 11:14am UTC](https://klipper.discourse.group/t/z-movement-is-doubled/16288/4 "2024-05-06T11:14:43Z")
The extruder has nothing to do with your z height!
It might overextrude and cause coarse and fat layers but the overall height stays the same.
If you command Z to move 25 mm and it moves 50 then the rotation distance is wrong:
it moves 8 mm per rotation when it should only 4.
As you do not use `full_steps_per_rotation` or `gear_ratio` there is no other setting.
However as you do not have any TMC section and require jumper settings maybe the `microsteps` value do not fit to the jumpered setting?!
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### Author:  [@xenerax](https://klipper.discourse.group/u/xenerax)
#### Post date: [May 6, 2024, 11:41am UTC](https://klipper.discourse.group/t/z-movement-is-doubled/16288/5 "2024-05-06T11:41:46Z")
in this case it kind of had but also kind of didnt.
due to the reduces layer height i had insane over extrusion but with help from the discord i figured out what the core of the problem is, i didnt use the uart mode right, now every thing works as intended.
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### Author:  [@hcet14](https://klipper.discourse.group/u/hcet14)
#### Post date: [May 6, 2024, 5:47pm UTC](https://klipper.discourse.group/t/z-movement-is-doubled/16288/6 "2024-05-06T17:47:50Z")
> [@xenerax](#):
>
> with help from the discord i figured out what the core of the problem is, i didnt use the uart mode right, now every thing works as intended.
So, what is the solution? Everybody is interested 😉
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### Author:  [@xenerax](https://klipper.discourse.group/u/xenerax)
#### Post date: [May 6, 2024, 6:28pm UTC](https://klipper.discourse.group/t/z-movement-is-doubled/16288/7 "2024-05-06T18:28:27Z")
i didnt realize that i had to uncomment the tmc2209 settings, so i did that.
incredible, right? 😉
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### Author:  [@system](https://klipper.discourse.group/u/system)
#### Post date: [July 5, 2024, 6:28pm UTC](https://klipper.discourse.group/t/z-movement-is-doubled/16288/8 "2024-07-05T18:28:55Z")
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